Family name Kolert (Kolert 
) , in the entire world, is a rare last name. The family name Kolert is habitual in Croatia, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Georgia, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Croatia, Bulgaria, and Germany. Very seldom, Kolert is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kolert | Bulgaria, Thailand, Croatia, Malaysia, Germany |